I love having moments of perspective like that. Here's one: If the Sun were the size of a football (soccerball to you), the Earth would be too small to be seen with the naked eye. Does my head right in just thinking about it!

Reminded me of the Eames' documentary "Powers of Ten" I saw in junior high; I don't think I was ever the same after that... It lead me straight into stacks of extracurricular science and science fiction.